Multi-oil-cylinder pushing method for large-size rock mass structural surface shear test based on bracket structure

Abstract

The invention relates to a multi-oil-cylinder pushing method for a large-size rock mass structural surface shear test based on a bracket structure. The method is characterized by comprising steps thatfirstly, a cuboid steel mold is adopted for pouring a large-size rock mass structural surface lower sample, a concrete pouring steel mold is designed according to the size of the rock mass structuralsurface upper sample, and N cuboid steel plates are fixed into a protruding small cuboid structure in the steel mold through the welding technology to be used for manufacturing the bracket structure;secondly, the steel mold is used for pouring a concrete upper sample and the bracket structure, and the length, width and height of the sample are L, W and H; and lastly, after pouring of the rock mass structural surface upper and lower sample is completed, M oil cylinders are arranged to push the samples to perform a shear test according to the sizes of the samples and the positions of the bracket structure, two oil cylinders are arranged at end parts of the samples, 2N oil cylinders are arranged at the two sides, and M is equal to 2N+2. The method is advantaged in that stress concentrationat ends of the samples can be avoided, accuracy and scientificity of the test result are improved, moreover, waste of manpower and material resources caused by unreasonable design of the sample can beavoided.

Description

technical field [0001] The invention relates to a multi-oil cylinder pushing method for a shear test of a large-scale rock mass structural surface based on a corbel structure, and belongs to the technical field of indoor physical and mechanical tests. Background technique [0002] In recent years, with the rapid development of my country's economy, some large-scale construction projects related to the national economy and people's livelihood have been implemented one after another, such as large-scale hydropower projects in the central and western regions, expressways and high-speed railways, deep resource mining, strategic oil reserves, and nuclear power projects. The stability and catastrophe problems are quite prominent, especially the landslide geological disasters of large-scale open-pit mines, water conservancy and other slopes, which seriously affect production, and cause casualties and heavy losses of equipment and mineral resources. A large number of literature studi...

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Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a multi-cylinder pushing method based on a corbel structure for a shear test of a large-scale rock mass structural surface, which can avoid stress concentration at the end of the sample and make each part of the large-size sample The force is relatively uniform, which solves the problem of local premature failure, improves the accuracy and scientificity of the test results, and at the same time avoids the waste of manpower and material resources caused by unreasonable sample design. provide scientific basis

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